Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd883caeee100d19…

MALICIOUS

PDF

67.0 KB Created: 2020-11-10 08:26:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 54d03205a0494a3cdec1e1a54f4ab74a SHA-1: d8e58643b1491e733ef66cab69dbe9f60fbf337a SHA-256: dd883caeee100d19d4395a8f9866450a2a882f4b4ff2b08349841dc5b9c10eb9
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ggtraff.ru/123?keyword=litigation+support+jobs+in+new+jersey In PDF document text
    • https://cdn-cms.f-static.net/uploads/4391326/normal_5f8fc711dceaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367277/normal_5f879c8535d3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418197/normal_5f96fb27d5ba1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382643/normal_5f9ef40ff17f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417644/normal_5fa1a878778c7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/luropi/new_google_chrome_free_download_for_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5100cef5-9da1-45e9-a1cd-befc42d46133/naliwomixesexu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab7a36ca-23d0-44f0-b936-fe54dfd34366/kilabusizafi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/522a3bc1-8ab7-4c7b-a11a-e73ddbd6ce14/inconnu_C3A0_cette_adresse_personnages.pdfIn PDF document text
    • https://s3.amazonaws.com/sugaguxagu/air_and_noise_pollution_control_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d189c568-50d0-4de1-98a2-41b1af27f2f6/60316602789.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa6c80cb-66b0-4b31-9438-f35955cdb57e/zimek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac7c0e4c-ff2b-4064-9add-d3e108c1baaa/10219491287.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/tolaxagu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAC1 5304 bytes
SHA-256: f800d9a142aa6ef218adb29c74f217710a5d6c5f6524d74a5c6ff1fae072a462
font_01_sfnt_off0000dcf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF7 10020 bytes
SHA-256: f4ca446f39d5ef612891bb08c3cd928dbe0ddfce41a8ef019a81007754488b1f

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